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【多选题】
高分子材料以高分子化合物为基础,其结构决定其性能,对结构的控制和改进,可获得不同特性的高分子材料。高分子材料独特的结构和易改性、易加工特点。使其具有其他材料不可比拟、不可取代的优异性能,从而广泛用于科学技术、国防建设和国民经济各个领域,并已成为现代社会生活中衣食住行用各个方面不可缺少的材料。下列属于现代高分子材料的是____。
A.
工程塑料
B.
钛合金
C.
化学纤维
D.
普通陶瓷
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举一反三
【单选题】下列关于奈替米星特点的叙述,错误的是
A.
对革兰阴性杆菌、革兰阳性球菌抗菌作用强
B.
抗铜绿假单胞菌抗菌作用强
C.
孕妇、哺乳期妇女禁用
D.
耳、肾毒性最强
【简答题】I had a dream for over a year to attend the Climate Change Conference in Copenhagen. I have even reserved a hostel room a year for advance. I had worked very hard to arrange things, but had trouble ra...
【单选题】Why did he stand at the back of the theater after he got back from the car?
A.
Because he was still worried.
B.
Because he didn't like to sit in the middle of the row.
C.
Because he couldn't find his seat again.
D.
Because he didn't like to bother the people again.
【简答题】奈替米星的主要特点是什么?
【单选题】Whats the topic discussed in this passage?
A.
Why people hold back their tears.
B.
Why people cry.
C.
How to restrain one's tears.
D.
How tears are produced.
【简答题】I had always _______upon the children that if they worked hard they would succeed in life.
【简答题】Why did Marge and her husband think it an extravagance for Marge to go back to work?
【单选题】I can't figure out ____ you didn't call Ted back that day. [     ]
A.
why it was that
B.
it was why that
C.
why was it that
D.
that it was why
【单选题】首先成功分离培养出沙眼衣原体的学是
A.
汤飞凡
B.
郭霍
C.
巴斯德
D.
李斯特
【简答题】Why did he stand at the back of the theatre after he got back from the car? Because he didn't want to ______ in his row again.
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